PJ vs CM vs CP vs MB vs CC: Cover Crop Comparison Guide

Cover Crop Comparison Guide: PJ vs CM vs CP vs MB vs CC

PJ, CM, CP, MB, and CC each excel in different conditions. The best choice depends on your soil pH, shade availability, rainfall, slope, and production goals. This guide helps plantation managers select the optimal cover crop species or mixture.

Full Comparison Table

Criteria PJ (Pueraria javanica) CM (Calopogonium mucunoides) CP (Centrosema pubescens) MB (Mucuna bracteata) CC (Calopogonium caeruleum)
Seeding Rate 4-8 kg/ha 3-5 kg/ha 3-6 kg/ha 320 seedlings/ha 2-3 kg/ha
N-Fixation 100-200 kg/ha/yr 80-150 kg/ha/yr 60-120 kg/ha/yr 150-200 kg/ha/yr ~90 kg/ha/yr*
Ketahanan terhadap naungan Sedang Moderate-High Tinggi Rendah Tinggi
Drought Tolerance Sedang Sedang Low-Moderate Rendah Moderate-High
Annual Biomass 6-12 t DM/ha 8-15 t DM/ha 4-8 t DM/ha 20-40 t DM/ha 3-7 t DM/ha
pH Range 4.5-6.5 4.0-6.0 4.5-6.5 4.5-7.0 4.0-6.0
Establishment Broadcast seed Broadcast seed Broadcast seed Nursery seedlings Broadcast or drill
Paling Cocok Untuk Moderate shade, balanced N Deeper shade, good biomass Dense shade, acidic soils Open plantations, high biomass Heavy shade, slopes, long-term cover

* CC has less published nitrogen-fixation data than the other species. The figure shown reflects indicative system contribution rather than a single measured fixation rate.

Species Recommendations

PJ: Pueraria javanica

Seeding: 4-8 kg/ha broadcast

Use PJ in plantations with moderate shade and neutral to slightly acidic soils. Ideal for oil palm and cocoa under standard spacing. Moderate drought tolerance suits areas with 1500-2500 mm rainfall. N-fixation: 100-200 kg/ha/yr. Biomass: 6-12 t DM/ha/yr.

View PJ Seeds

CM: Calopogonium mucunoides

Seeding: 3-5 kg/ha broadcast

Select CM for densely planted estates or acidic soils (pH 4.0-6.0). Superior biomass production (8-15 t DM/ha/yr) and shade tolerance make it excellent for rubber and mature cocoa plantations. N-fixation: 80-150 kg/ha/yr.

View CM Seeds

CP: Centrosema pubescens

Seeding: 3-6 kg/ha broadcast

Use CP in very dense shade environments where other legumes struggle. Best for mature rubber and dense cocoa canopies. Excellent persistence under deep shade. N-fixation: 60-120 kg/ha/yr. Biomass: 4-8 t DM/ha/yr.

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MB: Mucuna bracteata

Establishment: 320 seedlings/ha from nursery

Deploy MB in young plantations or areas with sparse canopy. Exceptional biomass (20-40 t DM/ha/yr) and N-fixation (150-200 kg/ha/yr) make it ideal for rehabilitation areas. Requires nursery preparation and adequate moisture.

View MB Seeds

CC: Calopogonium caeruleum

Seeding: 2-3 kg/ha (broadcast or drill)

Choose CC for the deepest shade and longer-term ground cover under mature canopies. It is more drought tolerant than CM and PJ and persists where faster species thin out, though it establishes slowly and can take up to 20 months to reach full cover. Suits mature oil palm and rubber, plus sloping blocks where erosion control matters. N-fixation: around 90 kg/ha/yr (less documented than the other species). Biomass: 3-7 t DM/ha/yr.

View CC Seeds

Mixed Stand Recommendations

PJ + CM: Combines moderate shade tolerance with high biomass. Excellent for transition-stage plantations with increasing canopy closure.

CM + CP: Extends shade adaptation across plantation maturity stages. CP takes over as canopy deepens.

Standard mix (PJ:CM:CP at 4:4:2): Broadcast 4 kg PJ + 4 kg CM + 2 kg CP per hectare for all-round coverage.

Adding CC: Blend a small proportion of CC into a mix (for example PJ:CM:CC) for persistent cover as the canopy closes, since CC holds on under heavy shade after faster species thin out.

Pertanyaan yang Sering Diajukan

Which species fixes the most nitrogen?

MB and PJ both achieve 150-200 kg/ha/yr. MB establishes fastest in open areas; PJ works under moderate shade. For dense plantations, CM provides 80-150 kg/ha/yr and CP 60-120 kg/ha/yr while tolerating higher shade. CC contributes around 90 kg/ha/yr but has less published data, so choose it for shade persistence rather than peak nitrogen.

Can I use the same species across my entire estate?

Mixed-aged plantations benefit from species diversity. Young or open areas suit MB; moderate shade suits PJ; mature or dense areas need CM, CP, or CC. Using one species risks performance loss in unsuitable conditions.

What is the cost difference between broadcast and nursery establishment?

Broadcast seeds (PJ, CM, CP, CC) cost RM 80-150/ha. Nursery seedlings (MB) require RM 400-600/ha upfront but establish faster. Calculate total cost per estate area and timeline.

How do I know if my soil pH suits these species?

All five species tolerate acidic to neutral soils. CM and CC are most acid-tolerant (down to pH 4.0). MB has the widest range (4.5-7.0). Most Malaysian plantation soils fall within 4.5-6.5, suitable for all five species.

Find Your Perfect Cover Crop Match

Use our interactive calculator to assess shade, rainfall, and soil conditions on your blocks.

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