Hemp as a break crop
Effects of Break Crops on Yield and Grain
Protein Concentration of Barley in a Boreal
Climate
Ling Zou 1*, Markku Yli-Halla 2, Frederick L. Stoddard 1, Pirjo S. A. Mäkelä
1. Department of Agricultural Sciences, University of Helsinki, Helsinki, Finland. 2 Department of Food and
Environmental Sciences, University of Helsinki, Helsinki, Finland
Rotation with dicotyledonous crops to break cereal monoculture has proven to be beneficial
to successive cereals. In two fields where the soil had been subjected to prolonged, continu-
ous cereal production, two 3-year rotation trials were established. In the first year, faba
bean, turnip rape and barley were grown, as first crops, in large blocks and their residues
tilled into the soil after harvest. In the following year, barley, buckwheat, caraway, faba
Citation: Zou L, Yli-Halla M, Stoddard FL, Mäkelä
bean, hemp and white lupin were sown, as second crops, in each block and incorporated ei-
PSA (2015) Effects of Break Crops on Yield and
ther at flowering stage (except barley) or after harvest
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Energy crops in rotation. A review
Walter Zegada-Lizarazu, Andrea Monti*
Department of Agroenvironmental Science and Technology, University of Bologna, Viale G. Fanin, 44 e 40127, Bologna, Italy
The area under energy crops has increased tenfold over the last 10 years, and there is large
consensus that the demand for energy crops will further increase rapidly to cover several
millions of hectares in the near future. Information about rotational systems and effects of
energy crops should be therefore given top priority. Literature is poor and fragmentary on
this topic, especially about rotations in which all crops are exclusively dedicated to energy end uses
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The insecticidal and nematocidal uses of hemp
Cannabis as repellent and pesticide
McPartland, John M. 1997. Cannabis as repellent and pesticide. Journal of the International Hemp
Association 4(2): 87-92
Cannabis has been used as a pest repellent and pesticide in a variety of formulations. It has
been planted as a companion crop to deter insects, nematodes, fungi, and weedy plants. Dried leaves and flowers
have repelled or killed insects, mites, nematodes, and weeds. Plant extracts (either aqueous or polar or ganic solvent
extracts) have killed or repelled insects, mites, nematodes, fungi, weedy plants, bacteria, and protozoans. Pure
cannabinoids reportedly inhibit or kill bacteria, fungi, and insect
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Nematicidal activities of Cannabis sativa L. and Zanthoxylum alatum Roxb. against Meloidogyne incognita
Tariq Mukhtar -
Department of Plant Pathology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
Muhammad Zameer Kayani - Green Belt Project, Department of Agriculture, Rawalpindi, Pakistan
Muhammad Arshad Hussain - Plant Pathology Section, Regional Agricultural Research Institute, Bahawalpur, Pakistan
Because of being costly and pernicious to the environment and human health, the use of nematicides has
become prohibitive in many countries and the management of plant parasitic nematodes using antagonistic plants can be a very attractive alternative. In the present studies the effectiveness of aqueous
extracts of Cannabis sativa and Zanthoxylum alatum was assessed on hatching, mortality and infectivity
of Meloidogyne incognita at different concentrations viz. S, S:1, S:5, S:10, S:25, S:50 and S:100. Both the plants had significant effects on juvenile mortality and hatching inhibition in a dose-dependent manner.
Mortality and hatching inhibition caused by C. sativa were significantly higher than that of Z. alatum. Time
duration also affected mortality and hatching inhibition significantly