1. 01 មករា 1959 This book includes factual description of all the main groups of vascular plants. It will dispaly the procedures, general principles, and objectives of comparative morphology. (the branch of biology that deals with the form of living organisms, and with relationships between their structures.)
  2. The following plant susceptibility list was compiled to guide research workers in planning experiments on specific problems. This list provides a general indication of the response to plants to picloram+.
  3. 01 កក្កដា 1989 Haloph introduces readers to the hundreds of halophytic species with potential for reclaiming salt-affected lands. It is hoped that the development of these species will be given a high priority.
  4. Abstract, There are various ways in which plant nutrient supply or concentration affects plant diseases and pests. The supply of nutrients changes the resistance of plants to pathogens and pests by altering growth and tissue composition (e.g., concentration of soluble compounds or defence...
  5. This article is from ECHO Asia Note #29 ធសចកីតធផតើម ពាកយចាសដពាលថា “អនកមិនអាចដោោះសរាយបញហា បនដទទបសិនដបើអនកមិនដឹងថាអនកមានបញហា ដ ោះ” ភសុតតាងវិទាាសរសតមូលោា នននការដធើវដោគវិនិចឆយដលើកងវោះាធាតុចិញច ឹមដលើរុកខជាតិ។ អសរយៈដពលជាដទចើនឆន ាំមកដ ើយ កសិករ និងអនកវិទាាសរសតបនដធើវការជាមួយគនន ដដើមបីកាំណតពីភសុតតាងននចកុខវ...
  6. The NPDN was established in 2002 in response to the need to enhance agricultural security through protecting health and productivity of plants in agricultural and natural ecosystems in the U.S. With support from the USDA-NIFA and through the collective efforts of many individuals representing...
  7. 15 មិថុនា 1993 Amazon.com Description This book discusses the role of essential nutrients in relation to nearly two dozen crops. Use the book's 307 color photographs to diagnose disorders in the field. The accompanying text explains symptoms in detail, with information provided by 31 crop experts. Covers the...
  8. ធនធានសំខាន់ 20 មករា 2009 All plants need certain mineral elements for proper growth, development, and maintenance. The basic structure of all organisms is built of carbon (C), oxygen (O) and hydrogen (H). Plants obtain these elements from water (H2O) in the soil and carbon dioxide (CO2) in the air, so no input is...
  9. Does unsafe food threaten public health in your country? Is the food you eat at risk of contamination? Or, perhaps, has your shipment of agricultural goods been held at the port of entry because of a potential cargo pest infestation? The sanitary and phytosanitary (SPS) plant health distance...
  10. ធនធានសំខាន់ This 4 part training gives a broad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter, biology and nutrients. After some classroom discussion we went head out to into the...