Two-hundred rice farming households from eight lowland villages in North-West Cambodia were surveyed 2020 to determine changes farmers’ knowledge, weed management practices and seed contamination kept for sowing. The major yield constraints cited by farmers lack of water, inability manage water competition weeds. Water shortages result reduced crop establishment, non-optimal herbicide applicati...

Ischaemum rugosum is a competitive weed in direct-seeded rice systems. Developing integrated weed management strategies that promote the suppression of weeds by crop density, cultivar selection, and nutrition requires better understanding of the extent to which rice interferes with the growth of this weed and how it responds to resource limitation due to rice interference. The growth of I. rugo...

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 We evaluated the soil organic carbon (SOC) pool and selected physico-chemical soil variables in a plantation with native tree species established in a degraded pasture of the Caribbean lowlands of Costa Rica. Studies on the rate and accumulation of aboveground biomass and C have been conducted in native tree plantations of Costa ...

Allergic rhinitis is the single most common chronic allergic disease affecting an estimated four million people in Malaysia. House dust mites, grass pollens and fungal spores play has been identified to play a major role in the pathogenesis of allergic rhinitis. However, sensitization to pollen and spores in Malaysia is not well documented. On the basis of the results of an aerobiological surve...

It is believed that wildlife and livestock can coexist in semiarid savanna rangelands. However, this coexistence is threatened by intense competition for scarce, but nutritionally vital, forage resources. Specifically, there is evidence that grazing livestock seasonally compete for protein-rich forbs (non-grasses) with browsing and mixed-feeding wildlife. While this has been attributed to prote...

Understanding grassland dynamics and their relationship to weather grazing is critical for pastoralists whose livelihoods depend on productivity. Studies investigating the impacts of climate human factors inter-seasonal have focused mostly changes vegetation structure. Yet, quantifying impact these specific communities not known. This study uses digital repeat photography examine how intra-seas...

The role of grass tussocks in supporting soil microbial biomass (SMB) in grazed ecosystems is not fully understood, nor is the spatial distribution of SMB in response to different grass species. We undertook a study in 1997 that examined ®ne-scale distributions of SMB in grazed experimental paddocks located in the eucalypt woodlands of northern Queensland, Australia. Levels of SMB were determin...