A nutrient loss reduction strategy is necessary to guide the efforts of improving water quality downstream an agricultural watershed. In this study, effectiveness two winter cover crops, namely cereal rye and annual ryegrass, explored as a in watershed that ultimately drains into supply reservoir. Using coupled optimization-watershed model, optimal placements crops were identified would result ...

The effects of five rates of nitrogen fertiliser applications on the performance of the cereal aphid Metopolophium dirhodum on winter wheat, within the range of rates recommended for UK crops, were investigated over two seasons in field-grown crops and also on plants grown in the glasshouse. Longevity was unaffected by the level of fertilisation, but aphid intrinsic rate of increase and fecundi...

The chickpea and pigeonpea are protein-rich grain legumes used for human consumption in many countries. Grain yield of these crops is low to moderate in the semi-arid tropics with large variation due to high GxE interaction. In the Indian subcontinent chickpea is grown in the post-rainy winter season on receding soil moisture, and in other countries during the cool and dry post winter or spring...

The influence of concurrent introduction of three transgenic vegetable cultivars on seasonal dynamics of coccinellids and their food, aphids and pollen, was examined within diversified farm systems practicing insect pest management in northeastern US agroecosystems. The transgenic cultivars used included sweet corn, potato, and winter squash, expressing Cry1(A)b, Cry3A, and plant viral coat pro...

Three crops of cucumber were grown in succession in beds by use of trickle irrigation, plastic film mulch, and soil chemical treatments over a 17-month period, including a fallow winter season. Total yield for the three crops was highest (1208 quintals/ha) in film-mulched plots treated with MBR-CP, and next-highest in film-mulched plots treated with DD-MENCS (1094 quintals/ha); total yield was ...

Certain forms of oleiferous brassicas (brown-seeded sarson, Japan rapes and toria) are grown in Pakistan as oilseeds and fodder crops, and some varieties of these have been introduced recently as new crops in consequence of work done at the Agricultural Research Institute, Lyallpur. In the young stage the plants are eaten as vegetables; the non-fibrous stem known as gandal mixed with the young ...

INTRODUCTION Canola, which is genetically modified (GM) for tolerance to glyphosate, has the potential to become established as a new glyphosate resistant weed, thus reducing the effectiveness of glyphosate. METHODS Volunteer from dormant canola seeds produced thousands of plants per hectare in the fourth year (2011) following a 2007 crop harvest. This occurred with no additional canola seed ...

Recent developments in visual-inertial and LiDAR sensors and simultaneous localization and mapping (SLAM) enable recording and digital reconstruction of the physical world. In this paper we utilize a hand-held multi-sensor platform for remotely recording and characterizing physical properties of crops on a field. The platform consists of a visual-inertial sensor, color camera and 2D LiDAR. We s...

Many weeds interfere with the productivity of wheat and other winter annual crops; however, one common weed Medicago denticulata, appears to have a beneficial effect. An experiment was conducted at Agricultural Experimental Farm of the Indian Statistical Institute, Giridih, Jharkhand to observe the effect of M. denticulata (a legume) on different crops yield of barley (Hordeum vulgare Sensu lat...

The effects of an autumn-planted, spring-killed, grass cover crop (Elymus trachycaulus [Link] Gould ex Shinners) on populations of Diabrotica virgifera virgifera LeConte and its predator community were evaluated in South Dakota maize fields over two seasons. Abundance and size of D. virgifera larvae and adults and sex ratio of adults were measured in maize produced under two treatments (i.e., a...