From bare to bountiful: the cover crop

At Chemiseed, we focus on providing high-quality, specially selected cover crop seeds tailored precisely to Malaysia’s unique environmental conditions. Let’s explore why cover crops matter and discover which Chemiseed varieties can best support your land.

Understanding cover crops: nature’s soil protectors

Cover crops are special plants grown not primarily for harvest, but for their ability to protect and improve soil quality. Farmers plant these crops between main crop cycles or underneath perennial crops like oil palm or coconut trees. Their main roles include:

Cover crops are plants that are planted to cover the soil

• Reduce soil erosion by physically protecting soil surfaces
• Improve soil fertility through nitrogen fixation
• Control invasive weeds naturally, reducing herbicide use
• Boost water retention and soil moisture to help crops through dry spells
• Enhance beneficial biological and microbial activity for healthier soil

Why are cover crops vital in Malaysia?

Malaysia’s tropical climate presents specific agricultural challenges. Heavy rainfall, extreme heat, and aggressive weed growth quickly damage bare, unprotected soils. Unprotected tropical soil loses topsoil to erosion, and with it much of its fertility.

Unlike conventional farming practices, cover cropping restores soil health rather than extracting from it. Cover crops offer a proven, cost-effective, and environmentally friendly solution, helping plantations and farms:

• Prevent topsoil loss and nutrient leaching.
• Control difficult weed species without heavy chemical reliance.
• Retain moisture during dry periods.

Chemiseed’s specialized cover crop varieties

Chemiseed supplies five cover crop species widely used in Malaysian plantations, each with unique strengths supported by research and practical experience.

1. Calopogonium caeruleum (CC): persistent cover once established

Calopogonium caeruleum is a long-lived legume valued for its persistence in plantation interrows. Once the cover has formed, its extensive root system helps stabilise the soil. It is slow to start: in oil palm interrow trials on Serdang and Selangor series soils, Han and Chew (1982) found C. caeruleum slow to establish but vigorous after establishment, which is why it is often sown together with a faster species such as PJ.

2. Centrosema pubescens (CP): ideal for shaded plantation areas

Centrosema pubescens is a shade-tolerant legume suited to plantation systems such as rubber, cocoa and coconut. As a nitrogen-fixing legume it adds to soil fertility as the cover grows, and in the same oil palm interrow trials Han and Chew (1982) observed it establishing rapidly.

3. Calopogonium mucunoides (CM): soft, manageable ground cover

Calopogonium mucunoides provides a soft ground cover that can be easily managed, cut back, or incorporated as green manure. It is quick and short-lived: PROSEA 11 (Chen Chin Peng and Aminah, 1997) notes that it covers the soil 3 to 6 months after sowing (sooner on newly cleared fertile land), forms a dense sward at 4 to 5 months, and is usually the first species shaded out in mixtures.

4. Mucuna bracteata (MB): superior weed control & erosion protection

Mucuna bracteata is particularly valued in Malaysia’s oil palm plantations. It forms dense coverage that outcompetes weeds and protects the soil surface from erosion. In a Universiti Putra Malaysia trial on mineral soil under oil palm, Samedani et al. (2015) recorded about 100% ground cover at 6 months from 680 seedlings/ha planted at 1.5 m spacing.

5. Pueraria javanica (PJ): restoring nutrient-poor soils

Pueraria javanica is known for its strong nitrogen-fixing ability: in one northeast Thailand trial under young rubber, the cover accumulated up to 250 kg N/ha per year in above-ground biomass, with 85 to 93% of that nitrogen from fixation (Clermont-Dauphin et al., 2016). Legume covers add nitrogen to the system; how much depends on site, cover and crop age.

Quick comparison guide

Tips:

Chemiseed’s varieties can be used alone or in strategic combinations, such as mixing CP with PJ or CC with MB, tailored to your farm’s specific needs.

Investing in cover crops: profitable sustainability

Initially, some growers view cover crops merely as an additional expense. However, a well-established legume cover is a long-term investment in the soil. Benefits can include lower herbicide and fertiliser use, healthier soils and better growing conditions for the main crop.

By choosing Chemiseed cover crop seed, germination- and purity-tested to ISTA and AOSA methods, you're making an informed decision that benefits your farm’s productivity, profitability, and environmental stewardship, building a solid foundation for long-term agricultural success.